Draft-arm



W. N. O-EHM.

DRAFT ABM..

APPLICATION FILED Aua.12, 1919.-

PatentedSept. 21, 1920.

WILLIAM N. OEHM, 0F MICHIGAN CITY, INDIANA.

DRAFT-ARM.'

Specication of Letters Patent. Patented Sept, 21, 192@ Application iled August 12, 1919. Serial No. 317,008.

To allfwhom it may concern.'

Be it known that I, WILLIAM N. OEHM, a citizen of the United States, and resident of Michigan City, county of Laporte, and State of Indiana, have invented certain new and useful Improvements in Draft-Arms, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to draft arms, and has for its object the production of a draft arm which shall be stronger for the amount of metal utilized than draft arms now in use. A further object of the invention is the provision of draft arms which will allow of a more secure attachment to the center sills than has been heretofore obtained.

In the accompanying drawings,

Figure 1 is a side view of the draft arm showing the bolster and end sill in section;

Fig. 2 is a plan view of a pair of draft arms and a portion of the bolster, with parts broken laway to show the draft arm in section;

Figs. 3 and 4 are sections on lines 3 3 and 4 4, respectively, of\F ig. 1.

In the drawings 10 is used to 'designate the wrought draft arm as a whole, which draft arm comprises a web 11 and ianges 12. The center sills of the car preferably take the form of channel beams 13, having webs 14 and anges 15. The bolster is indicated at 16, and the lower bolster'plate at 17. The opemng for the king pin is seen at 18, resulting from semi-cylindrical'depressions in the mating lfiller blocks 19. y

I have lllustrated my draft arms as nesting with the channels which constitute the center sills of the car, and as having the webs of said sills riveted to the draft arms, as shown at 20. The end sill of the car is indicated at 21, and draft and buffng lugs at 22, 23.

It will be observed from the disclosure of Fig. 2 and a comparison of Figs. 3 and 4, that the metal of the web of the channel, comprising the draft arm, is thicker at its point of attachment to the center sills than it is toward the end. This increased thick- In a railway car, in combination, a center sill projecting beyond the bolster, bolster filler blocks between said sills and bolster members having side and end anges exterior of said sills, adraft arm nesting with the projecting end of the sill and abutting against one of said members, a buiing block interior of said projecting end and abutting against one of said filler blocks, and rivets securing said sill, draft 'arm and buifmg blocks together, the web of the draft arm lbeing thickened at its area of attachment.l

WILLIAM N. OEHM. 

